| http://www.w3.org/ns/prov#value | - Preference is given to polymerizing olefins of the formula Ra --CH???CH--Rb, where Ra and Rb are identical or different and are each a hydrogen atom or a carbon-containing radical having from 1 to 20 carbon atoms, in particular from 1 to 10 carbon atoms, and Ra and Rb together with the atoms connecting them can form one or more rings.
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